The lifetime of a helium 23s1 metastable atom electronic spin-state is measured in helium gas using optical pumping techniques. The metastable atoms are created by an RF electrical discharge. The spin-state lifetime is ...

Spin-polarized electron energy loss spectroscopy (SPEELS) has been used to investigate several paramagnetic surfaces. In this technique, a low energy beam of spin-polarized electrons from a GaAs source is directed at the ...

A measurement Is reported of the proton polarization achieved in a polymer sample through the solid effect. The sample is a polymerized alkyne; the paramagnetism arises from free radicals trapped in the polymer structure. ...

An experiment in progress to extract a polarized beam of electrons from an optically pumped helium source gas is described. Possible ionization mechanisms in helium gas are outlined and the methods of optical pumping are ...

An experimental apparatus is described which provides a spatial decay of the excited species from a helium discharge. This "flowing afterglow" has been constructed and the helium metastable atoms He(23S1) are seen to decay ...

Optical pumping techniques can be used to produce nuclear polarization in He3 gas excited by a weak electric discharge. By optically polarizing He3 to a polarization P0 and extracting ions from the gas, the resulting ion ...

Spin-polarized electron energy-loss spectroscopy has been used to investigate the probing depth of low energy ($\sim$30 eV) electrons in metals. A beam of spin-polarized electrons is directed at the surface of the sample ...

A comparison is made of relative number densities of excited states produced in Helium gas excited by an RF discharge and by the high energy (200kev, maximum) electron beam, it being found that the 33D states are relatively ...